package/rp-pppoe: drop first patch

This patch has been added to buildroot more than eleven years ago in commit
e9ae739ce757d73657ef860e21ccc78b3d55816e however it seems that rp-pppoe
builds perfectly fine without it nowadays.

- ac_cv_linux_kernel_pppoe=no just gives a warning;
- HAVE_LINUX_KERNEL_PPPOE is set by configure based on the presence of
  the appropriate header.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/rp-pppoe/0001-krn-plugin.patch

@@ -1,27 +0,0 @@
-[Fabrice: update patch for 3.14]
-Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
-diff -Nura rp-pppoe-3.11.orig/src/configure rp-pppoe-3.11/src/configure
---- rp-pppoe-3.11.orig/src/configure	2012-08-21 10:01:10.536440032 -0300
-+++ rp-pppoe-3.11/src/configure	2012-08-21 10:01:45.353442397 -0300
-@@ -4517,7 +4517,7 @@
- modprobe pppoe > /dev/null 2>&1
- fi
- if test "$cross_compiling" = yes; then :
--  ac_cv_linux_kernel_pppoe=no; echo "cross-compiling, default: "
-+  ac_cv_linux_kernel_pppoe=yes; echo "cross-compiling, default: "
- else
-   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
- /* end confdefs.h.  */
-diff -Nura rp-pppoe-3.11.orig/src/pppoe-server.c rp-pppoe-3.11/src/pppoe-server.c
---- rp-pppoe-3.11.orig/src/pppoe-server.c	2012-08-21 10:01:10.535440032 -0300
-+++ rp-pppoe-3.11/src/pppoe-server.c	2012-08-21 10:02:02.597443569 -0300
-@@ -20,6 +20,9 @@
- 
- #include "config.h"
- 
-+/* Patched hack to make this cross compile */
-+#define HAVE_LINUX_KERNEL_PPPOE 1
-+
- #if defined(HAVE_NETPACKET_PACKET_H) || defined(HAVE_LINUX_IF_PACKET_H)
- #define _POSIX_SOURCE 1 /* For sigaction defines */
- #endif